[sdiy] BBD Chips

[Fdi]

There is a very simple yet attactive circuit from Craig Anderton. Simple
enough I would attempt to build it on test board.
http://hammer.ampage.org/files/Anderflange1.PDF

It uses a SAD-1024 bbd. Taking a fast look, do you think it can be tricked
easely to use the MN chips? (no skills to see that)

So one could run it at high speed -with the MN clock- to get very short
delay for PhisMod and also flanging...

What do you think? (well, if you'd like to think at all)    =:)

Fernando
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f
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> De: "Scott Stites" <scottnoanh at peoplepc.com>
> Fecha: Tue, 22 Jul 2003 06:39:20 -0700 (PDT)
> Para: synth-diy at dropmix.xs4all.nl
> Asunto: Re: [sdiy] BBD Chips
>
> I've gotten very good results both for chorus and flanging using the
MN3207.
> The
> spec sheet gives a 200 kHz max clock rate for a minimum delay time of 2.56
ms,
> which is in the heart of flanging territory.  Seems I've overclocked the
chip
> too
> for even better results with no problem, but I'm at work now and can't
> remember
> the particulars.  Looking at various manufacturer schematics for flangers,
> choruses and ensemble choruses, it seems they routinely overclocked BBD's.
> Maybe
> Harry mesmerised the manufacturers and overclocking *really* destroys them
> =0).
>
> The MN3102 clock is definitely worth the few extra bucks.  It rather
> uncomplicates things, and the waveshaping in it helps to ensure you don't
have
> any clock overlap.  Using that, the addition of a couple of transistors
makes > a
> nice logrithmic current sink for flanging.
>
> Cheers,
> Scott

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